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PKU v. THU (Preliminary Round 2)
Time Limit: 6 s
Memory Limit: 256 MB
Total points: 100
# 2792. 幸运数字
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The problem was used in the following contest:
2016 四川省代表队选拔赛 (SCOI 2016) Day 1
原 PDF 题目标题有误,修正为:幸运数字
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